Alert archive / Maryland / Flash Flood Warnings / 2025
Flash Flood Warnings in Maryland, May 2025
7 flash flood warnings in May 2025. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of flash flood warnings reaches back to 1986.
Flash Flood Warnings by county
Each county as a circle sized by its count in May 2025. Tap one for its archive.
- Flash Flood Warnings
- 7
- Busiest day
- May 13, 20254 flash flood warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 5, 7:38 PM EDT | Flash Flood Warning | LWX | Frederick | 3 hr |
| May 13, 12:57 PM EDT | Flash Flood Warning | LWX | Allegany, Garrett | 5 hr |
| May 13, 1:00 PM EDT | Flash Flood Warning | LWX | Allegany, Garrett | 5 hr |
| May 13, 1:52 PM EDT | Flash Flood Warning | LWX | Garrett | 4 hr |
| May 13, 2:49 PM EDT | Flash Flood Warning | LWX | Allegany | 3 hr |
| May 30, 7:54 PM EDT | Flash Flood Warning | LWX | Howard, Montgomery, Prince George's | 3 hr |
| May 30, 8:14 PM EDT | Flash Flood Warning | LWX | Anne Arundel, Baltimore, Howard, City of Baltimore | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.